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Selective hydrogenation of furfural for high-value chemicals: effect of catalysts and temperature
Sustainable Energy & Fuels ( IF 5.6 ) Pub Date : 2020-09-07 , DOI: 10.1039/d0se01090a
Haihong Xia 1, 2, 3, 4, 5 , Changzhou Chen 1, 2, 3, 4, 5 , Peng Liu 1, 2, 3, 4, 5 , Minghao Zhou 6, 7, 8, 9 , Jianchun Jiang 1, 2, 3, 4, 5
Affiliation  

Transformation of furfural (FFA), a typical representative of furan platform chemicals derived from the acid hydrolysis of hemicellulose to the high value chemicals tetrahydrofurfuryl alcohol (THFOL) and cyclopentanol (CPL), has drawn great attention. In this study, we report an efficient NiCo bimetallic catalyst with highly dispersed NiCo-based metals on a porous carbon matrix for FFA hydrogenation. For different FFA conversion reactions of the bimetallic catalysts, the tetrahydrofurfuryl (THFOL) yield was up to 95% over the Ni3Co1@C catalyst at 80 °C. Furthermore, cyclopentanol (CPL) could also be obtained with a yield of 95% with Ni1Co1@C as the catalyst at 160 °C in an aqueous medium. The detailed physicochemical characterization was carried out by means of XRD, SEM, BET, ICP, XPS, NH3-TPD and Raman analysis. With the addition of Co in the bimetallic catalysts, the average particle size decreased obviously to around 5.7 nm in NixCoy/C catalysts with different Ni/Co ratios, which increased the dispersion and improved the catalytic activity of FFA hydrogenation. The NixCoy@C catalysts could be recovered and efficiently applied in the next run for four consecutive recycling tests in FFA hydrogenation to the corresponding target products under different reaction conditions. The results suggested that the NixCoy@C catalyst appeared to increasingly favor the formation of Ni–Co alloys and suggested a metallic active site in FFA hydrogenation with the addition of the Co element. Mechanistic study indicated that temperature was a key factor contributing to the formation of different desired products (THFOL and CPL). Furthermore, water was another essential factor, which was responsible for the arrangement of the furan compound.

中文翻译:

高价值化学品糠醛的选择性加氢:催化剂和温度的影响

糠醛(FFA)是呋喃平台化学物质的典型代表,它是由半纤维素酸水解成高价值化学物质四氢糠醇(THFOL)和环戊醇(CPL)的代表。在这项研究中,我们报告了一种高效的NiCo双金属催化剂,在多孔碳基质上具有高度分散的基于NiCo的金属,用于FFA加氢。对于双金属催化剂的不同FFA转化反应,在80°C下,四氢糠基(THFOL)的收率比Ni3Co1 @ C催化剂高95%。此外,在160°C的水性介质中,以Ni1Co1C为催化剂,也可以得到95%的环戊醇(CPL)。详细的理化特性通过XRD,SEM,BET,ICP,XPS,NH 3进行-TPD和拉曼分析。在双金属催化剂中加入Co后,在不同Ni / Co比的Ni x Co y / C催化剂中,平均粒径明显减小至5.7 nm左右,从而增加了分散度,提高了FFA加氢的催化活性。可以回收Ni x Co y @C催化剂,并在下一轮中有效地将其用于FFA加氢中在不同反应条件下连续进行四个连续循环测试以得到相应的目标产物。结果表明,Ni x Co y@C催化剂似乎越来越有利于Ni-Co合金的形成,并暗示在添加Co元素的FFA加氢中有金属活性位点。机理研究表明,温度是导致形成不同所需产物(THFOL和CPL)的关键因素。此外,水是另一个必不可少的因素,这是呋喃化合物排列的原因。
更新日期:2020-09-28
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